USB: image: microtek: clean up urb->status usage

This done in anticipation of removal of urb->status, which will make
that patch easier to review and apply in the future.

Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/image/microtek.c

···
 #define MTS_DEBUG_INT() \
 	do { MTS_DEBUG_GOT_HERE(); \
 	     MTS_DEBUG("transfer = 0x%x context = 0x%x\n",(int)transfer,(int)context ); \
-	     MTS_DEBUG("status = 0x%x data-length = 0x%x sent = 0x%x\n",(int)transfer->status,(int)context->data_length, (int)transfer->actual_length ); \
+	     MTS_DEBUG("status = 0x%x data-length = 0x%x sent = 0x%x\n",transfer->status,(int)context->data_length, (int)transfer->actual_length ); \
              mts_debug_dump(context->instance);\
 	   } while(0)
 #else
···
 		      context
 		);
 
-	transfer->status = 0;
-
 	res = usb_submit_urb( transfer, GFP_ATOMIC );
 	if ( unlikely(res) ) {
 		MTS_INT_ERROR( "could not submit URB! Error was %d\n",(int)res );
···
 static void mts_data_done( struct urb* transfer )
 /* Interrupt context! */
 {
+	int status = transfer->status;
 	MTS_INT_INIT();
 
 	if ( context->data_length != transfer->actual_length ) {
 		context->srb->resid = context->data_length - transfer->actual_length;
-	} else if ( unlikely(transfer->status) ) {
-		context->srb->result = (transfer->status == -ENOENT ? DID_ABORT : DID_ERROR)<<16;
+	} else if ( unlikely(status) ) {
+		context->srb->result = (status == -ENOENT ? DID_ABORT : DID_ERROR)<<16;
 	}
 
 	mts_get_status(transfer);
···
 static void mts_command_done( struct urb *transfer )
 /* Interrupt context! */
 {
+	int status = transfer->status;
 	MTS_INT_INIT();
 
-	if ( unlikely(transfer->status) ) {
-	        if (transfer->status == -ENOENT) {
+	if ( unlikely(status) ) {
+	        if (status == -ENOENT) {
 		        /* We are being killed */
 			MTS_DEBUG_GOT_HERE();
 			context->srb->result = DID_ABORT<<16;
···
 static void mts_do_sg (struct urb* transfer)
 {
 	struct scatterlist * sg;
+	int status = transfer->status;
 	MTS_INT_INIT();
 
 	MTS_DEBUG("Processing fragment %d of %d\n", context->fragment,context->srb->use_sg);
 
-	if (unlikely(transfer->status)) {
-                context->srb->result = (transfer->status == -ENOENT ? DID_ABORT : DID_ERROR)<<16;
+	if (unlikely(status)) {
+                context->srb->result = (status == -ENOENT ? DID_ABORT : DID_ERROR)<<16;
 		mts_transfer_cleanup(transfer);
         }